Dan's Data has published an article about IBM keyboards
Clicky IBM keyboards have never been easier to find. Cheap used ones, new-old-stock "vintage" ones, brand new ones made by Unicomp; heck, you can even find the ones with TrackPoints or trackballs (or, for one very odd model, a TrackPoint _and_ a trackball), if you look.IBM keyboards - the odyssey continues
I explore the options for the modern loud heavy butch buckling spring keyboard enthusiast, circa 2005, here